1.

A car has a kinetic energy of 2000 J. What will be its kinetic energy if its speed is doubled?

Answer»

If speed is increases, the KINETIC energy is also increases because kinetic energy and VELOCITY are directly proportional.

The Kinetic energy is 8000J

KE = 2000 J

mv²/2 = 2000 J

When speed gets doubled.,

= m(2v)²/2

= 4mv²/2

= 4 * (mv²/2)

= 4 * 2000 J

= 8000 J



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